Table 1

Definition of the database indexes of asthma severity and control developed according to the Canadian Asthma Consensus Guidelines

Asthma severity and control	ICS daily dose* (μg)	Other controller therapy†	SABA doses per week‡	Marker of moderate to severe exacerbations§
ICS, inhaled corticosteroid; SABA, short-acting β₂ agonist.
*Daily dose of ICS in beclomethasone-chlorofluorocarbon equivalent over a 12 month period.
†Other controller therapy: at least six prescriptions of long-acting β₂ agonist, theophylline or leucotriene receptor antagonists dispensed over a 12 month period.
‡Average number of inhaled short-acting β₂ agonist doses per week calculated over a 12 month period.
§An emergency department visit for asthma, a hospital admission for asthma or a filled prescription of an oral corticosteroid over a 12 month period.
Mild
Controlled	0–500	No	0–3	No
	0–250	Yes	0–3	No
Uncontrolled	0–250	Yes	0–3	Yes
	0–500	No	0–3	Yes
	0–250	Yes	4–10	No
	0–500	No	4–10	No
Moderate
Controlled	251–500	Yes	0–10	No
	501–1000	Yes/no	0–10	No
	>1000	Yes/no	0–3	No
Uncontrolled	0–250	Yes	4–10	Yes
	0–500	No	4–10	Yes
	0–250	Yes	>10	No
	0–500	No	>10	No
	251–500	Yes	>10	No
	251–500	Yes	0–10	Yes
	501–1000	Yes/no	>10	No
	501–1000	Yes/no	0–10	Yes
Severe
Controlled	>1000	Yes/no	4–10	No
Uncontrolled	0–1000	Yes/no	>10	Yes
	>1000	Yes/no	0–10	Yes
	>1000	Yes/no	>10	Yes/no